Tape-sealing machine



Dec.` 23, 1924.

C. C. GAMM TAPE SEALING MACHI-NE Filed Nov, 18, 1921 Patented Dec. 23, 1924i,

siren srarss PATENT OFFICEe CHARLES C. Gril-1MM, OF ST. PAUL, MINNESOT, ASSEGNOR TO WALDORF PAPER PROD- UGTS COJE'ANY, A CORPORATION OF MNNESOTA.

T'EE-SEALNG MACHINE.

Application filed November 12, 1921.

To all whom t may concern.'

Be it known that l, CHARLES C. GAMM, a citizen of the United States, residing at St. Paul, in the county of Ramsey and State of Minnesota, lhave invented new and useful lmprovements in Tape-Sealing Machines, of which the following is a specification.

ln the manufacture of carton containers the blanls are first cut from sheets of paste board or similar material and are then crimped to facilitate bending at the cornersof the finished container. rlhe blanks thus cut and crimped are now folded and tape is yused to join adjacent edges of the blanks.

Obviously the strength of the finished container depends upon the efficiency of the union and the tape, which is held in place by a suitable adhesive such as glue, must be pressed upon and caused to conform to the carton surface and then held under uniform pressure until the adhesive has penetrated the carton or set. `With machines in common use, the tape frequently breaks loose, thus rendering the carton useless. In my improved machine l provide means whereby the tape is forced to conform to uneven surfaces of the carton blanks and is then held under uniform and continued pressure so that secure sealing results.

It is my object to provide novel, simple and efficient means for attaching sealingtape in the. manufacture of carton containers.

Another object of my invention is to provide means for causing sealing-tape which has previously been pressed on cartons to be held under uniform pressure until the adhesive has set.

Other objects of my 'invention will appear and be more fully pointed out in the following` specification and claim.

Referring to the accompanying drawings, which illustrate the best form of my device at present known to me, Fig, 1 is a plan view of my improved tape sealing machine; F ig. 2 is a side elevation of the same; Fig. 3 is an end view of one of the finished cartons in upright position and Fig. t is an end view of the same in collapsed position.

Cartons to be completed by the application of tape are placed upon a table top 1, supported upon transverse joists 2, the ends of said joists being secured to longitudinal Serial No. 516,144.

angle irons 3 which are supported upon legs 4C. A roller 5, Vprovided with a suitable rubber cover 6, is mounted upon a shaft 7 at the receiving end of the machine. This roller is mounted above a drum 8 and coacts with an endless belt 9 to feed the taped cartons to the compressing wheel 10. The upper run of the belt 9 is supported upon the top 1 and said belt passes around and is driven by a drum 11 at the opposite end of the machine. The latter drum is fast on a shaft 12 supported in suitable bearings on the longitudinal angle irons 3. A second endless belt 13, equal in width to the belt 9, is mounted above the latter upon drums 14C and 15. These drums are rigidly mounted on transverse shafts 16 and 17, respectively, which are adjustable vertically in bearings 18. The lower run of the belt 13 moves adjacent to the upper run of the belt 9 and is held downward to compress the cartons by a pressure plate 19. This plate 19 is supported near its ends by a pair of channel bars 2O which are bent downward and adjustably supported at their ends upon the outer faces of the longitudinal angle irons 3. Adjustment is secured by bolts 21 which pass through vertical slots in said channel bars and are suitably secured to said angle irons.

The compressing wheel 10 is supplied with a pneumatic tire 22 and is revolubly supported upon an axle 23, carried in the ends of a pair of arm-s 2d. rllhese arms are pivotally supported at their opposite ends on a transverse beam 25, which is in turn supported at its ends upon vertical channel bars 26. The bars 26 are secured to the outer faces of the longitudinal angle irons 3.

My machine is operated by a suitable motor 27 which drives a belt 23 around a pulley 29. The latter pulley is fast on a shaft 30, carrying' smaller pulleys 31 and 32 on its ends. The pulleys 31 and 32 drive belts 33 and 34, respectively, which severally drive pulleys 35 and 36, mounted on the ends of the shafts 12 and 17. The belt 34 is twisted to drive trie shaft 17, carrying the drum 15 in the proper direction. As will be readily understood, the sha-ft 16 is driven by the belt 13 and a pulley 37, on said shaft, drives a pulley 38 on the shaft 7 by means of a belt 39. Vertical adjustment of the shafts 7, 16 and 17 is secured by means of adjusting bolts 40 which are threaded in the bearing caps and engage the bearing blocks carrying said shafts.

O permitan.

With the machine in operation the cartons 41 are folded on the table top 1 adjacent to the roller 5, and the gummed tape 42 is applied over the junction of the desired ends or corner of the container as shown in Fig. 1. The container and tape is now fed end foremost between the rubber covered roller and upper run of the belt 9. l/Vith the several parts of the machine in operation, in the direction indicated by arrows in Fig. 2, the carton is dra-wn between the roller 5 and belt 9 and the tape is pressed onto said carton. The carton is now moved beneath the pneumatic tire 22 of the compressing wheel 10. This wheel and the arms 24 are of sufficient weight to firmly press the tape on the carton and the resiliency of said tire causes the tape to conform to any irregularities or roughnesses in the surface of the carton. The carton now passes beneath the belt 13 and is carried between the lower run of said belt and the upper run of the belt 9 to the end of the machine. During this last movement the pressure plate 19 firmly holds the lower run of the belt 13 in contact with the tape and carton, thus preventing loosening of the tape until the glue has had time to penetrate the carton or to set. When the cartons pass out from between the belts 13 and 9, said cartons may be opened to the position shown in Fig. 3 and the carton is complete.

Having described my invention what l claim as new and desire to protect by Letters Patent is:

In a tape sealing machine, a supporting table, a feed roller revolubly mounted on said table, an endless belt mounted above said table with its lower run adjacent tothe top of said table, a second endlessA fbelt mounted with its upper run on said table and arranged to carry taped cartons beneath said feed roller and first mentioned belt, a pressure plate arranged to hold adjacent runs of said belts in contact with the cartons and tape and means for actuating said feed roller and belts.

In testimony whereof, I have hereuntoI signed my name to this specification.

CHARLES C. GAMM. 

